Automatic armature winding machine



Feb. 3, 1953 H. w. MOORE 2,627,379

AUTOMATIC ARMATURE WINDING MACHINE Filed Feb. 1, 1949 7 Sheets-Sheet lFeb. 3, 1953 H. w. MOORE 2,627,379

AUTOMATIC ARMATURE WINDING MACHINE Filed Feb. 1, 1949 7 Sheets-Sheet 2Feb. 3, 1953 H. w. MOORE 9 AUTOMATIC ARMATURE WINDING MACHINE Filed Feb.1, 1949 7 Sheets-Sheet 5 II- v 238 H. W.- MOORE AUTOMATIC ARMATUREWINDING MACHINE Feb. 3, 1953' 7 Sheets-Sheet 4 Filed Feb. l, 1949INVENTOR.

Feb. 3, 1953 H. w. MOORE 2,627,379

AUTOMATIC ARMATURE WINDING MACHINE Filed Feb. 1, 1949 7 Sheets-$heet 5H. w. MOORE 2,627,379 AUTOMATICIARMATURE WINDING MACHINE '7 Sheets-Sheet6 Feb. 3, 1953 Filed Feb. 1, 1949 Feb. 3, 1953 H. w. MOORE AUTOMATICARMATURE WINDING MACHINE '7 Sheets-Sheet 7 Filed Feb. l, 1949 I N VENTOR.

Patented Feb. 3, 1953 AUTOMATIC ARMATURE WINDING MACI I IN E Harry W.Moore, Dayton, Ohio Application February 1, 1949, Serial No. 73,927

11 Claims.

This invention relates to an automatic armature winding machine and moreparticularly to an armature winding machine wherein the coils are woundsuccessively without cutting the wire between coils during the windingoperation, although not necessarily limited to an armature win-dingmachine, in that the same principle could be incorporated in otherdevices in which a series of coils are being wound.

An object of this invention is to provide an automatic coil windingmachine for winding the coils in the slots of an armature, wherein thecoil winding operation upon the completion of one coil is momentarilyinterrupted while the armature is indexed, so as to place succeedingpairs of slots in registry with the wings of the coil winder, andforming a loop between successive coils without cutting the wire, andwithout manually manipulating the mechanism, so that the coil windingmachine operates continuously until all of the slots in the armaturehave been wound, at which time the coil winding machine automaticallystops while the wound armature is ejected and a new armature is placedin position, the wire remaining unsevered, so that the wound armaturemay be held together by one or more wires extending from one armature tothe other, the machine being provided with mechanism for providing aslack in the wire extending from the wound armature to the armature thatis being wound, so as to permit indexin of the armature without unduetension and strain in the wire or wires connecting succeeding armatures.

Another object of this invention is to provide a pawl member adapted toproject into the path of the wire leaving the spinners only when thearmature being wound is indexed, the pawl member moving out of the pathof the spinners immediately after a loop has been provided inthe wirebetween successive coils.

Another object of this invention is to provide a holding mechanism forholding an armature that has just been ejected from an armature windingmachine, which holding mechanism provides means for slacking the wirebetweenthe armature that is being wound and the armature on which thewinding has been completed, so as to permit indexing of the armatureduring the winding operation.

Another object of this invention is to wind a series of coils, one afterthe other, the winding machine causing a relative shifting of positionsbetween the winding mechanism and the coil supports after the completionof one coil or the 2 completion of a series of coils, which shiftingtakes place automatically without the attention of th at ndan Otherobjects and advantages reside in the construction of parts, thecombination thereof and the mode of operation, as will become moreapparent from the following description.

In the drawings Figure 1 is a fragmentary, perspective View of anarmature winding machine provided with loop-forming mechanism forforming loops between successive coils.

Figure 2 is a front elevational view with parts broken away and partsshown in section so as to disclose the armature indexing pawl,

Figure 3 is a longitudinal cross sectional view taken substantially onthe line 3-3 of Figure 2 Figure 4 is a schematic, fragmentary,perspective view of the pawl mechanism for forming loops.

Figure 5 is another schematic, perspective view similar to Figure 4,disclosing the loop-forming pawl projected into loop-forming position.

Figure 6 is another schematic, perspective view similar to Figures 4 and5, disclosing the pawls for forming the loops in the retractedpositionafter the loops have been formed.

Figure 7 is a longitudinal cross sectional view of the pawl actuatingmechanism.

Figure 8 is a transverse cross sectional view, taken substantially onthe line 8--8 of Figure 7.

Figure 9 is a transverse cross sectional view, taken substantially onthe line 9-9 of Figure 7, Showing the pawls in loop-forming position.

Figure 10 is another view similar to Figure 9, wherein the pawls havebeen actuated into a loop-holding position.

Figure 11 is another cross sectional view similar to Figures 9 and 10,disclosing the pawls in re-. tracted position, wherein the pawls havereleased the loops.

Figure 12 is a fragmentary, cross sectional view, taken substantially onthe line 12? of Figure 9.

Figure i3 is a diagrammatic view of the air supply line used inpneumatically actuating the various controls of the coil windingmachine.

Figure 14 is a schematic wiring diagram of the electrical system used incontrolling the coil winding machine.

The device disclosed herein is a pneumatically or hydraulicallycontrolled winding machine pro-. vided with chuck members functioning aswind-1 ing wings for supporting the armature or a core forthe coils tobe wound, which chuck is associated with an indexing mechanism forindexing the armature after each set of coils has been wound. The chuckmechanism is automatically released after each set of coils has beenwound so as to permit indexing. Furthermore, the device includes amechanism projecting into the path of the wires laid by the spinners forforming a pair of loops at the end of each pair of coils, which loopsare produced by reversing the spinners for half a revolution at the sametime that a pair of pawls is projected into the path of the wires laidby the spinners, to thereby form the loops. These loops may be formedeither prior to or after the indexing operation.

After the loops have been formed and the armature has been properlyindexed so as to cause new pairs of slots to be advanced into registry,the chucks again engage the sides of the armature preparatory to thespinners laying coils in the new slots, after which the indexing and theformation of new loops takes place, as described above. The machine isfully automatic from the time it is started until all of the coils havebeen wound in the proper slots in the armature, each of the coilsterminating in loops at the ends, used in connecting to the riser barsof the commutator segments.

Referring to the drawings, the reference character Ill indicates thebase or the support for a coil winding machine. Mounted upon the base Iis a hollow bed l2. The bed [2 is provided with an upwardly directedportion terminating in a dove-tailed transverse guide portion l4. 'Thisguide portion 14 supports housing members 16 and i8 which are adjustablymounted for lateral movement.

As may best be seen by referring to Figure 2, the housing member 16 isprovided with a downwardly directed lug 20 attached to a lever 22fulcrumed at 24 and connected to a link 26, which is a piston rodattached to a piston 2'! within the cylinder 26, as seen in Figure 13.The cylinder 2B is connected by a conduit 36 to a reservoir 32 havingair under pressure therein, and. controlled by a foot pedal 34, so thatwhen the operator steps on the foot pedal 34, air is supplied'to thecylinder 28 through the conduit 30, so as to actuate the housing memberI6 to the left for reasons that will appear more fully later.

The housing member I8 is also provided with a downwardly projecting lug40 connected to a lever '42 attached at 44 to a piston rod or link 46attached to a piston 41 mounted in the cylinder 48. The movement of thepiston rod 46 in the cylinder 48 is very small, on the order of afraction of an inch.

'As' may best be seen by referring to the schematic showing in Figure13, the piston rod 46 is normally biased to the right as viewed in Fig-Tue 13, or to the left, as viewed in Figure 2, by a compression spring50. The cylinder 48 is connected by a conduit 52 to a source of airpressure through a suitable valve mechanism such that pressure issupplied to actuate the piston towards the left, as viewed in Figure 13,whenever the winding machine passes through the indexing portion of thecycle, as will appear more fully later. In other words, the spring iseffective only when the winding machine is actually winding coils, aswill be described more fully later.

The lower end of the lever 42 is attached to a piston rod 54 shown inFigure 13, connected to a piston 56 in the cylinder 58. Air pressure issupplied to the cylinder 58 by means of a conduit 59 connected to thesource of air pressure reservoir 32. Whenever the foot pedal 34 ispressed downwardly, air pressure is supplied to the cylinder 58 toactuate the piston 56 to the right, as viewed in Figure 13, to cause thelever 42 to pivot about the pivot 44 to actuate the housing member I8 tothe left, as viewed in Figure 13 and to the right, as viewed in Figure2.

The gear housing member [6 has a shaft 60 j ournalled therein. When themachine is winding an armature, the shaft 66 is rotated through asuitable driving mechanism which has not been shown. Likewise, the gearhousing member l8 has a shaft 62 journalled therein, which is driventhrough a suitable gear mechanism not shown. Shafts 60 and 62 rotate inopposite directions. The large end of the shaft 60 supports a chuck 64,the end of the shaft being journalled in the chuck. The end of the shaft62 supports another chuck member 66, journalled on the end thereof. Thechuck members 64 and 66 do not rotate with the shafts 60 and 62. Thechuck members 64 and 66 cooperate to support an armature l0 clampedtherebetween.

The chuck member 66, which has been shown in section in Figure 2,supports an indexing mechanism including an actuating member 12 and apawl 74. The pawl 14 is normally biased towards the armature 16 by asuitable spring, not shown. The indexing mechanism i actuated upwardlyby means of a plunger '16, pneumatically driven, which wil1 be describedmore fully later, causing the actuating member 72 to be raised andprojected into the chuck member 66, thereby raising the pawl 14 toengage a succeeding winding slot in the armature. However, before thistakes place, the cylinder 48 actuates the link 46, so as to separate thechucks a fraction of an inch to permit the pawl 14 to rotate thearmature 16 in a clockwise direction, as viewed in Figure 2, so as toadvance a new pair of slots into registry with the chuck 66 and a newpair of slots into registry with the chuck 64. As soon as the armaturehas been indexed, the armature is clamped in position through the actionof th compression springs 50.

As may best be seen by referring to Figures 3 and 13, the indexingmechanism i actuated by a piston rod connected to a piston located inthe cylinder 82. As best seen in Figure 3, the piston rod 80 terminatesin a rack 84, meshing with a pinion 86 having a width sufficient to meshwith the rack 88 fixedly attached to the plunger 16. As soon as thearmature has been indexed, the piston rod 80 is actuated in the cylinder82 into home position, so as to retract the plunger 16 to provide aclearance for rotation of a spinner 90. The indexing rod 12 of theindexing mechanism is biased into down position by a suitable spring,not shown. A spinner 92 is mounted near the end of the shaft 60.

As may best be seen by referring to Figure 1, a fly wing 94 is attachedto the chuck 64 and a fly wing 96 is attached to the chuck 66, forguiding the wires, as will appear more fully later.

As may best be seen by referring to Figure 1, an L-shaped arm 98 has oneend in engagement with the side of a lamination of the ar mature 10, soas to prevent the armature 10 from moving endwise between the chucks 64and 66. The arm 98 is automatically raised when the chuck members arereleased for the purpose of reloading another armature by a suitablemechanism that has not been disclosed. The arm 98 guides the wire fromthe spinner into the proper slot when the winding operation is resumedafter the armature has been indexed, as will appear more fully later.

When the new armature core is inserted or when a coil has beencompleted, it is necessary to index the armature so as to align fourslots into winding position. Two of the slots on one side and adjacentone chuck member receive the windings of one coil and the other twoslots adjacent the other chuck receive the windings of another coil atthe same time. These windings are laid in position by the spinners 90and 92.

The mechanism for automatically stopping the operation of the spinnersafter the desired number of layers have been laid in the slots tocomplete the coils causes the spinners to stop in a predeterminedposition. The spinners are shown in this position in Figure l. Themovement of the spinners is arrested in this position and held thereinby the brake cylinder 93 shown in Figure 13.

During the portion of the cycle that the armature is indexed inreadiness for another pair of coils to be wound, several steps in theprocess of winding the armature take place. Whether the loop extendingfrom the end of the coil is formed before or after the indexingoperation is optional. For some types of armatures, it is preferable toform the loop before the armature is indexed. In other types ofarmatures it is preferable to form the loop after the armature has beenindexed. If the loops are formed before the indexing takes place, thereis an extra wire laid in one slot of each completed coil which has noutility other than a conductor having a current flowing in a directionopposite to the flow of current in the adjacent windings in thecompleted coil. If the loops are formed after indexing, then there is aninactive wire in the first slot of the coil to be wound. Although theindexing operation has already been described and the loop formingoperation is now about to be described, the device disclosed herein hasbeen so timed and the cycle so arranged that the loop is actually formedbefore the indexing takes place.

When a pair of coils has been completely wound, it is necessary toprovide leads extending from the coils that have been wound and alsoprovide leads for the new coils that are to be wound in the succeedingcycle of operation. In forming the loops, a valve H0 is opened byactuating the plunger I I2 downwardly, as viewed in Figure 13. This maybe done manually or automatically, as will appear more fully later. Inso doing, a pilot valve II4, shown in Figure 13, releases the pressureon the conduit H6 and supplies pressure to the conduit II8, the conduitsH6 and H8 being connected to opposite ends of the cylinder I20 shown inFigures 3 and 13.

. In view of the fact that there is normally pressure in the conduitII6, it can readily be seen that normally the piston I22 is seated inthe lower end of the cylinder I20, as viewed in Figure 13. When thepilot valve H4 is actuated in response to the opening of the valve H0,the piston rod I24 is actuated upwardly, as viewed in Figures 3 and 13.As the piston rod I24 is raised, it actuates a gear supporting a pawlI26 in a clockwise direction, as viewed in Figure 3. The piston rod I24supports a bracket I28 provided with a downwardly directed plunger I30.When the valve H0 is again closed, the

conduit H8 is de-energized, so that there is no pressure in thisconduit, but instead, pressure is supplied to conduit II6, actuating thepiston I22 downwardly, which causes the pawl [26 to engage a notch inmember I32 keyed to a shaft I34, resulting in the shaft I34 beingrotated until the downwardly directed plunger I 30 engages a pawlrelease member I36, releasing the pawl 26 from member I32. The shaftI34, through a suitable gear mechanism not shown. actuates the spinners90 and 92 backwards about one-half of a revolution, so as to lay a Wirein the reverse direction from the direction in which the coil that hasjust been finished has been wound.

In order that the last wire laid into theslot shall not be unwound fromthe slot or retracted from the slot and in order to provide a loop forattaching the ends of the coils to the commutator riser bar, a suitablepawl mechanism has been provided. which is projected into the path ofthe wire extending from the armature to the spinner, which mechanismwill now be described.

When a back-up flier cylinder I20, shown in Figure 13, is supplied witha fluid pressure through the conduit II8 so as to actuate the piston rodI24 upwardly, the plunger I30 releases a lever I48 normally holding avalve I42 closed, so as to open the valve I42, to thereby supply fluidpressure to a lead pull cylinder I44, shown in Figures 2, 3 and 13. Whenpressure is supplied to the cylinder I44, a piston I46, which isnormally held in the lower end of the cylinder I44 by a helical springI48, is raised upwardly, as best seen in Figure 13. By supplying thepressure to the lower end of cylinder I44, as viewed in Figure 13, thepiston I46 compresses the spring I48, so as to raise the piston rod I50,the upper end of which terminates in a rack I52 meshing with a pinionI53 fixedly attached to a tubular sleeve I54 by a stud I55, as bestshown in Figures 4, 5 and 6.

The tubular sleeve I54 is mounted for rotation in a support 3I2adjustably mounted upon the frame of the winding machine, as will appearmore fully later. A set screw I51, extendin through a slot I54a in thetubular member I54, threadedly engages a supporting member I56, whichwill be more fully described later. As may best be seen by referring toFigures 7 to 11 inclusive, the tubular sleeve I 54 is fixedly attachedto a pawl supporting structure consisting of members I58 and I60. A pairof pins I62 and I64 span the distance between members I58 and I60, sothat these members are held in fixed spaced relation and oscillated inunison with respect to the support 3I2. A hand actuated lever I6I, shownin Figure l is attached to a collar I63 mounted for oscillation with thetubular sleeve I54 and vice versa, that is, the tubular sleeve I54 maybe oscillated by manually operating the handle I6I.

A pair of spacer members I10 and I12 are fixedly mounted between membersI58 and I60,

so that the spacer members will rotate or oscil late with members I58and IE0. A pair of leaf springs I14 and I16 rest upon spacer members I10and I12 and are fixedly mounted in suitable notches provided therefor inmembers I58 and I68, as best seen in Figure 12. The outer ends of theleaf springs I14 and I16 are curved and are seated in suitable recessesnear the ends of the pawl members I and I82. The pawl meme. b'ers- I80and I82 have each been provided with a detent I 84, adapted for aportion of a cycle to engage detents I85 in the stationary supportingmember I56. The pawl members I80 and I82 are each provided with aprojection I99 functioning as a stop engaging the pins [52 and I64, soas to limit the outward thrust of the pawl members I30 and I82, whichare biased to the outward position by the leaf springs I14 and I16, asshown in Figures 9 and 10. As the rack I52, integral with the piston rodI56, is raised upwardly from the position shown in Figure 6 to theposition shown in Figure 5, members I58 and IE6 are rotated in acounterclockwise direction from the position shown in Figure 10 to theposition shown in Figure 9.

In passing from the position shown in Figure 9 to the one shown inFigure 10, the detent I86 engages the detent I84, so as to retard therotation of the pawls I89 and I82, the springs I14 and I76 yielding.This causes the pawls I80 and I82 to be retracted so as to be positionedbetween members I58 and Si}, thereby stripping the previously formedloops from the pawls I80 and I82. As may be clearly seen by referring toFigure 11, the normally outwardly projecting ends of the pawls I80 andI82 are retracted so as to lie wholly between members I58 and IE5.Members I58 and IE2? continue to rotate about the fixed supportingmember I55. The pins I52 and IE4, generating arcs of a circle, lift thedetents I 84 out of engagement with the detents I85. As soon as thedetents I84 disengage the detents I 36, the pawl members I86 and I82 aresnapped outwardly by the leaf springs I74 and I16 into the positionshown in Figure 9. The pawls are arrested in their outward movement bythe projections I99 engaging the pins I62 and I6 3.

After the pawl members I85 and I82, together with members I58 and IEhave been projected outwardly into the substantially horizontalposition, as viewed in Figure 9, the spinners or fliers 9D and 92 areturned backward half a revolution,- so that the wires 26d and 2132 arehooked upon the pawl members respectively, as shown schematically inFigure 5. As soon as the cylinder I44 is de-energized, the spring I48actuates the piston I49 downwardly, so as to retract the rack I52 fromthe position shown in Figure to the position shown in Figures 4 and 6,thereby rotating members I58 and I50 from the position shown in Figure 9to that shown in Figure 10. The loop in the wires 290 and 292 arethereby actuated out of the path of the spinners or fliers 9t and 92..

These loops are held in this position until the next pair of coils havebeen wound. The armature is then ready to be indexed. The indexinoperation of the armature has been previously described.

After the armature has been indexed so as to present new slots inwinding position, the valve 220 is opened, causing the cylinder 230provided with a piston rod 232 to be actuated upwardly, as viewed inFigure 13, by the release of the pressure in the conduit 234, causingthe clutch lever 236, shown in Figure 3, to be actuated upwardly,releasing the brake holding the operating mechanism in locked positionand for engaging a clutch, not shown, mounted within the housing 238, soas to drive the spinners or fliers to wind another coil. The clutch isbiased into clutch engaging position by a spring, not shown, whichspring also biases the clutch lever 236 upwardly as viewed in Fig- I82and I88 8 ure 3. These operations are repeated cyclically until all ofthe slots of the armature have been wound.

In order to provide a winding machine that is fully automatic from thetime an armature is first inserted until all of the slots have beensupplied with the proper windings, an automatic control mechanism hasbeen provided, shown schematically in part in Figure 14.

The driving mechanism for actuating the winding machine actuates a disc250 shown in Figure 14, which makes one revolution during the time thatis required to wind all the coils in position required for an armature.A shaft 252, shown in Figures 2 and 3 makes a predetermined number ofrevolutions when the disc 256 makes one revolution. If, for example, tencoils are required for an armature, five being wound by each of thespinners, the shaft 252 would then make five revolutions when the disc259 makes one revolution. This has been accomplished by means of theinterconnecting driving mechanism, not shown. This interconnectingdriving mechanism may be any suitable type of driving mechanism, as forexample, gears arranged to be changed to get various speed ratiosbetween the discs 250 and the shaft 252. The shaft 252 has mountedthereon three cams 2G5, 262 and 254, adapted to engage and actuate inproper sequence the valves H0, 220 and 27d. From this it can readily beseen that by properly selecting and timing the various cams, the valvesH8, 220 and 279 can be actuated so as to carry out all of the operationsrequired to completely wind an armature.

The cam 2B2 actuates the valve 220 at the completion of the windingoperation of each pair of coils, so as to cause the cylinder 230 toactuate the lever 236, shown in Figure 3, downwardly or in acounterclockwise direction so as to release the clutch connecting thedriving mechanism to the prime mover, thereby interrupting the rotationof the spinners and applying a brake to the driving mechanism tostop thespinners in a predetermined position. As the shaft 252 rotates, the cam262 opens the valve 220 to release the fluid supplied to the cylinder280 to again permit the compression spring, not shown, to actuate theclutch members into clutch engaging position and at the same timerelease the brake to again initiate the rotation of the spinners to winda pair of succeeding coils.

By referring to the wiring diagram shown in Figure 1.4, it is to benoted that it is necessary for the operator to actuate the switches 280and 282 simultaneously and to momentarily press the push button 283 toclose the switch 285 in order to energize the relay 284 actuating theclutch-actuating lever 281. By so doing, clutch 286 is engaged, therebyconnecting the winding machine to the prime mover. It can readily beseen that as the disc 250 rotates a short distance, the switch arm 29!]disengages the fixed contact 292 and snaps into engagement with thefixed contact 2534. When the switch arm 290 snaps into contact with thefixed contact 294, the starter switch 235 may then be released, theoperator maintaining the switches 280 and 282 closed.

By referring to Figure 1, it can readily be seen that the switch 282 islocated on one side of the machine and the switch 280 on the oppositeside of the machine. The push button 283 is located adjacent the switch280, so that by pressing upon the switch 280, the operator can pressupon the push button 283 with the thumb of his left hand while actuatingthe switch 282 with his right hand. It is necessary for the operator topress on the switches 28D and 282 during the winding operation.Releasing the hand from either one of these switches interrupts theoperation of the machine by deenergizing the relay 284. The reason forthis requirement is to keep both hands of the operator occupied when thewinding machine is operating, to thereby prevent the operator fromgetting his hands injured by the winding machine.

When an armature has been completely wound, the operator steps on thefoot pedal 34 shown in Figures 2 and 3, which supplies pressure to theleft end of the cylinder 59 and to the right end of cylinder 28, so-asto actuate the housing I6 to the left and actuate the housing 8 to theright, as viewed in Figure 2, to thereby separate the chuck members 64and 66 a distance sufliciently far to permit the armature Ill mounted inwinding position to be removed rearwardly into the chute 3H1, as bestseen in Figure l, the two wires from the spinners remaining connected.The support 3I2 for supporting the lead pull mechanism is then actuatedforwardly, as viewed in Figure 1, through the guide slots 314, so as topermit insertion of a new armature between the chuck members 64 and 66.

After a new armature has been positioned, member 98 is dropped intocontact with one edge of the armature and the support 3I2 is broughtback into the home position shown in Figure 1, with the armature shaft3I6 projecting into the recess 318 in member I56. The foot pedal 3'4 isthen released, so as to cause the chuck members to grip the sides of thearmature. The

armature shaft projecting into a recess provided therefor in member I56prevents the chucks from rotating with the supporting shafts. Beforebeginning the winding operation, the armature is first indexed and aloop is formed extending from the pawls I80 and I82, so as to provide aterminal for the leading ends of the first coils to be wound. It is tobe noted that a wire extends through the first slot of the armature fromthe previous armature, which 1 wire has no utility other than for thepurpose of winding the armature. In other words, a dead end wire remainsin the first slot on each side.

In the event it is found desirable for the operator to control thewinding machine for any reason whatsoever, he may do so. As best shownin Figures 2 and 3, hand control levers 320, 322 and 324 are associatedwith the switches H8, 226 and 219 respectively. These control levers arelocated between the switches and the cams 250, 252 and 264.

By providing members I58 and 160 with suitable clearances so as not toshed the loop and by retracting the pawls I 813 rearwardly, as viewed inFigure 11, so as to cause the edge 33!! of each to engage the edge 332of each of the members H5 and I12, the edges 330 and 332 would thenfunction as cutting tools or as shears for cutting the wire forming theloop. Thus, the ends of the coils forming the loops would be severed inreadiness to be attached to the riser bars or commutator tangs.

As far as the operation of the machine is concerned, it is immaterialwhether one or two spinners are used. Two spinners have been shown forthe reason that for some types of armatures two spinners may be used,thereby reducing the time required for winding each armature.

Although the preferred embodiment of the device has been described, itwill be understood that within the purview of this invention variouschanges may be made in the form, details, proportion and arrangement ofparts, the combination thereof and mode of operation, which generallystated consist in a device capable of carrying out the objects setforth, as disclosed and defined in the appended claims.

Having thus described my invention, I claim:

1. A coil winding machine for winding a slotted armature, said coilwinding machine including a pair of chuck members for holding thearmature in winding position, a pair of spinner members for laying apair of wires in two pairs of armature slots to simultaneously form apair of arma-- ture coils, a pair of pawls projecting into the path ofthe wires, there being one pawl for each spinner member so as to form aloop between adjacent ends of adjacent coils wound by the same spinnermember, supporting means for supporting the pawls, said supporting meansincluding a pair of parallel frame members, spacer members for holdingthe parallel frame members in spaced relation, the pawls resting uponthe spacer members, a concentrically disposed supporting member forsupporting the frame members and having detents, resilient means forurging the pawls into contact with the detents, and means foroscillating the frame members upon the concentrically disposed member tothereby cause a relative movement between the frame members and thepawls to project the pawls into the path of the wires and forwithdrawing the pawls from the path of the wires.

2. A coil winding machine for use in winding a slottedarmature,including a, pair of chuck members for holding a slotted armature inwinding position, a pair of spinner members for laying a pair of wiresin two pairs of armature slots to simultaneously form a pair of armaturecoils, means for indexing th armature upon the completion of each pairof coils, a pair of pawls projecting into the paths of the wires, therebeing one pawl for each spinner member so as to form a pair of loops oneat the end of each cell that has been wound and the adjacent coil to bewound, means for supporting and actuating the pawls, said meansincluding a pair of frame members, a pair of spacer members mountedbetween the frame members, a concentrically disposed supporting memberhaving detents, said frame members being mounted for oscillatorymovement on said concentrically disposed memher, the pawls being mountedbetween the frame members and resting upon the spacer members, resilientmeans for urging the pawls into contact with the detents, means foractuating the frame members and the spacer members to thereby causrelative movement of the pawls engaging the detents with respect to theframe members and the spacer members, and means for actuating theindexing means so as to position two other pairs of slots in coilwinding position.

3. A coil winding machine for use in winding a slotted armature,including chuck members for holding the armature in position, the chuckmembers functioning as wings guiding the wire used in forming the coilsinto the slots, spinner members for layin the wire in the slots, meansfor indexing the armature upon the completion of each set of coils, apair of means for forming loops, each of said last mentioned meansforming a loop at the end of each completed coil and the succeeding coilwound by the same spinner member, said pair of means including a pair ofpawls one for each of the spinner members, said pawls projecting intothe paths of the wires emanating from the spinner members, means drivenin synchronism with the spinner members and projecting and withdrawingeach pawl into and out of the path of the respective wires at thecompletion of the winding of a pair of coils, each of said pawls whenprojecting into the path of the wire forming a loop at the end of awound coil and the succeeding coil wound by the same spinner member, andmeans for retracting the pawls from the paths of the wires after theloops have been formed to permit the spinner members to wind thesucceeding pair of coils.

4. A coil winding machine for use in winding a slotted armatureincluding chuck members for holding the armature in position, the chuckmembers functioning as wings guiding the wires used in forming the coilsinto the slots, spinner members for laying the wires in the slots, meansfor indexing the armature upon the completion of each set of coils,means for engaging the wires upon each set of coils, said last mentionedmeans including pawls projecting into the paths of the wires emanatingfrom the spinner members, means including a cam driven in synchronismwith the spinner members, a fiuid driven means controlled by the cam forprojecting the pawls into the paths of the wires at the completion ofthe winding of a set of coils, and means for reversing the spinnermembers through 180 when the pawls are projected into the paths of thewires to thereby form loops, said cam and said fluid driven meansretracting the pawls from the paths of the wires after the loops havebeen formed.

5. A coil windin machine for winding a slotted armature, said coilwinding machine including means for holding the slotted armature inwinding position, means for laying the wire used in forming the windingsin the slots of the armature, means for causing a relative rotarymovement between the means for holding the armature and the means forlaying the wire to cause the wire to be laid into the slots to form thearmature windings, means for arresting the relative rotary movement in apredetermined relative position, a pawl member projecting into the pathof the wire, means including a cam, a cam follower, and fluid drivenmeans, said cam being driven in synchronism with the means for layingthe wire for projecting and withdrawing the pawl member into and out ofthe path of the wire at the completion of the winding of a coil, andmeans for causing a relative movement between the holding means and thewire laying means in a reverse direction so as to form a loop at the endof a winding forming a coil.

. 6. A coil winding machine for winding a slotted armature, said coilwinding machine including means for holding the slotted armature inwinding position, a spinner member for laying the wire in a pair ofarmature slots to form a coil, means for rotating the spinner member,means for arresting the spinner member in a predetermined position,means including a pawl projecting into the path of the wire, meansresponsive to the movement of the spinner member for projectin andwithdrawing the pawl into and out of the path of the wire at thecompletion of the winding of a coil, and means for reversing the spinnermember through a portion of a revolution so as to cause the meansprojecting into the path of the wire to engage the wire to form a loopand so as to lay a wire in the slot in reverse direction of thecompleted coil, said last mentioned means including a shaft rotating insynchronism with the spinner member, a notched member fixedly mountedupon the shaft, a fluid actuated piston, and a pawl attached to thepiston and engaging the notch in the notched member for rotating theshaft through a fraction of a revolution when the piston is actuated inone direction, the shaft reversing th spinner member through a fractionof a revolution.

'7. A coil winding machine for winding a slotted armature, said coilwinding machine including means for holding the slotted armature inwinding position, a spinner member for laying the wire in a pair ofarmature slots to form a coil, means for rotating the spinner member,means for arresting the movement of the spinner memher in apredetermined position upon the completion of a coil, brake means forholdin the spinner member in arrested position, means including a pawlprojecting into the path of the wire, means responsive to the movementof the spinner member for projecting and withdrawing the pawl into andout of the path of the wire at the completion of the winding of a coil,and means for releasing the brake means and reversing the spinner memberthrough substantially half of a revolution so as to form a loopat theend of the coil, said last mentioned means including a shaft rotating insynchronism with the spinner member, a notched member fixedly mountedupon the shaft, a fluid actuated piston, and a pawl attached to thepiston and engaging the notch in the notched member for rotating theshaft through a fraction of a revolution when the piston is actuated inone direction, the shaft reversing the spinner member through a fractionof a revolution.

8, A coil winding machine for winding a slotted armature, said coilwinding machine including means for holding the slotted armature inwinding position, a spinner member for layin the wire in a pair ofarmature slots to form a coil, means for rotating the spinner member,means for arresting the movement of the spinner mem ber in apredetermined position upon the completion of a coil, said lastmentioned means including a cam, means projecting into the path of thewire immediately after the completion of a coil, said last mentionedmeans including a cam driven in synchronism with the spinner member, andmeans for reversing the direction of rotation of the spinner member soas to form a loop at the end of the completed coil, said last mentionedmeans including a shaft rotating in synchronism with the spinner member,a notched member fixedly mounted upon the shaft, a fluid actuatedpiston, and a pawl attached to the piston and engaging the notch in thenotched member for rotatin the shaft through a fraction of a revolutionwhen the piston is actuated in one direction, the shaft reversing thespinner member through a fraction of a revolution.

9. A coil winding machine for winding a slotted armature, said coilwinding machine including means for holding the slotted armature inwinding position, 9, spinner member for laying the wire in a pair ofarmature slots to form a coil, means for rotating th spinner member,means for arresting the movement of the spinner memher in apredetermined position upon the completion of a coil, said lastmentioned means including a cam, means projecting into the path of thewire immediately after the completion of a coil, said last mentionedmeans including a cam driven in synchronism with the spinner member,means for reversing the direction of rotation of the spinner member soas to form a loop at the end of the completed coil, said last mentionedmeans including a shaft rotating in synchronism with the spinner member,a notched member fixedly mounted upon the shaft, a fluid actuatedpiston, and a pawl attached to the piston and engaging the notch in thenotched member for rotating the shaft through a fraction of a revolutionwhen the piston is actuated in one direction, the shaft reversing thespinner memher through a fraction of a revolution, and means for indexinthe armature upon the coil being completed, said last mentioned meansincluding a cam, and a fluid drive system, said fluid drive systemincluding a valve, a cylinder, a piston, and a link mechanism forconnecting the piston to a pawl engaging a slot so that as the piston isactuated in one direction the armature is indexed.

10. A coil winding machine for winding a slotted armature, said coilwinding machine including means for holding the slotted armature inwinding position, means for layin a pair of wires used in forming a pairof windings in the' slots of the armature, means for causing a relativerotary movement between the means for holding the armature and the meansfor laying the wires to cause the wires to be laid into the slots toform the armature windings, a pair of pawl members projecting into thepath of the wires for forming a pair of loops one for each coil, cammeans driven in synchronism with the means for laying a pair of wiresfor projecting the pawl members into the path of the wires and forretracting the pawl members out of the path of the wires at thecompletion of the layin of a pair of coils, and means for cutting theloops to remove the loops from the pawl members.

11., A coil winding machine for winding a slotted armature, said coilwinding machine including means for holding the slotted armature inwinding position, means for laying the wire used in forming the windingsin the slots of the armature, means for causing a relative rotarymovement between the means for holding the armature and the means forlaying the wire to cause the wire to b laid into the slots to form thearmature windings, a pawl member, and means driven in synchronism withthe means for laying the wire for effecting a relative movement betweenthe wire laying means and the pawl member so as to cause the path of thewire to overlap the pawl member to form a loop.

HARRY W. MOORE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,307,620 Crane June 24, 19191,871,970 Emmert Aug. 16, 1932 1,890,111 Eaton Dec. 6, 1932 2,348,948Allen May 16, 1944

